The novel begins with a brief
foreword stating that whether the novel "is fact or fiction, my readers must decide for themselves" and implying that the events occurred. At Appleyard College, a private
boarding school for upper-class girls near
Mount Macedon, Victoria, a
picnic is being planned for the pupils under the supervision of Mrs. Appleyard, the school's headmistress. The picnic entails a day trip to
Hanging Rock, on
St Valentine's Day in 1900. One of the pupils, Sara, who is in trouble with Mrs. Appleyard, is not allowed to go. Sara's close friend Miranda goes without her. When they arrive, the pupils relax and eat lunch. Afterwards Miranda goes to climb the
monolith with classmates Edith, Irma, and Marion, despite being forbidden to do so. The girls' mathematics teacher, Greta McCraw, follows behind them separately. Miranda, Marion, and Irma climb still higher in a trance-like state while Edith flees in terror; she returns to the picnic in hysterics, disoriented and with no memory of what occurred. Miss McCraw cannot be accounted for either except for being seen by Edith, who passed her ascending the rock in her underwear. The school scours the rock in search of the three girls and their teacher, but they are not found. The disappearances provoke much local concern and international sensation with rape, abduction, and murder being assumed as probable explanations. Several organized searches of the picnic grounds and the area surrounding the rock itself turn up nothing. Meanwhile the pupils, teachers, and other staff of the school, as well as members of the community, grapple with the riddle-like events. Mike Fitzhubert, an Englishman who was picnicking at the grounds on the same day, embarks on a private search of the rock and discovers Irma, unconscious and on the verge of death. When he fails to return from his search, he is found in an unexplained daze, sitting at the rock with Irma, by his friend and uncle's coachman, Albert Crundall. Concerned parents begin withdrawing their daughters from the prestigious school, prompting various staff to leave; the handyman and maid quit their jobs and the French instructor, Mlle. Dianne de Poitiers, announces that she will be getting married and leaving as well. A junior governess at the school, Dora Lumley, also leaves with her brother Reg, only for both to be killed in a hotel fire. Amidst the unrest both in and around the school Sara vanishes, only to be found days later, having apparently died by
suicide (her body being found right beneath the school's tower, with her head "crushed beyond recognition"). Mrs. Appleyard, distraught over the events that have occurred, kills herself by jumping from a peak on Hanging Rock. In a
pseudo-historical afterword purportedly extracted from a 1913
Melbourne newspaper article, it is written that both the school and the Woodend Police Station, where records of the investigation were kept, were destroyed by a bush fire in the summer of 1901. In 1903 rabbit hunters came across a lone piece of frilled
calico at the rock, believed to have been part of the dress of the governess, Miss Greta McCraw, but neither she nor the girls were ever found.
Excised final chapter According to her editor, Sandra Forbes, Lindsay's original draft of the novel included a final chapter in which the mystery was resolved. At her editor's suggestion Lindsay removed it prior to publication. Chapter Eighteen, as it is known, was
published posthumously as a standalone book in 1987 as
The Secret of Hanging Rock by Angus & Robertson Publishing. The chapter opens with Edith fleeing back to the picnic area while Miranda, Irma, and Marion push on. Each girl begins to experience
dizziness and feels as if she is "being pulled from the inside out." A woman suddenly appears climbing the rock in her underwear, shouting "Through!", and then faints. This woman is not referred to by name and is apparently a stranger to the girls, yet the narration suggests she is Miss McCraw. Miranda loosens the woman's
corset to help revive her. Afterwards the girls remove their own corsets and throw them off the cliff. The recovered woman points out that the corsets appear to hover in mid-air as if stuck in time and that they cast no shadows. She and the girls continue together. The girls then encounter what is described as "a hole in space", by which they physically enter a crack in the rock following a lizard; the unnamed woman disappears into the rock. Marion follows her, then Miranda, but when Irma's turn comes a balanced boulder (the hanging rock) slowly tilts and blocks the way. The chapter ends with Irma "tearing and beating at the gritty face on the boulder with her bare hands." The missing material amounts to about 12 pages; the remainder of the publication
The Secret at Hanging Rock contains discussion by other authors, including John Taylor and Yvonne Rousseau. The suspension of the corsets and description of the hole in space suggest that the girls have encountered some sort of
time warp, which is compatible with Lindsay's fascination with and emphasis on clocks and time in the novel. ==Conception==